Archaeonectrus_rostratusAristonectesparvidensAttenborosaurusconybearAugustasaurushagdorniBEDFM_1999_slash_201BMNH_49202BMNH_R2439BrachaucheniuslucasiBrancasaurusbrancaiCallawayasauruscolombieColymbosaurus_svalbardensisCymatosaurusCryptocliduseurymerusDjupedalia_engeriDolichorhynchopsherscheDolichorhynchopsosborniEdgarosaurusmuddiElasmosaurus_platyurusEopolycotylusrankiniEromangasaurusaustralisEurycleidusarcuatusFHSMVP321HauffiosauruslongirostrisHauffiosaurustomistomimusHauffiosauruszanoniHydrorionbrachypterygiuHydrotherosaurusalexandKaiwhekeakatikiKimmerosauruslanghamiKronosaurusqueenslandicLeptocleiduscapensisLeptocleidussuperstesLibonectesmorganiLiopleurodonferoxMacroplatatenuicepsManemergusanguirostrisMaresauruscoccaiMicrocleidushomalospondMuraenosaurusleedsiiNichollsauraborealisOccitanosaurustournemirOUMNH_J_dot_02247OUMNH_J_dot_10337OUMNH_J_dot_28585PalmulasaurusquadratusPeloneustesphilarchusPlesiopleurodonwellesiPlesiosaurusdolichodeirPlesiosaurusmacrocephalPliosaurusandrewsiPliosaurus_brachydeirusPliosaurus_brachyspondylusPliosaurus_funkeiPliosaurus_macromerusPliosaurus_rossicusPliosaurus_sp_BRSMG_Cc332PolycotyluslatipinnisQMF_18041RhomaleosaurusmegacephaRhomaleosaurusvictorRhomaleosauruszetlandicSeeleyosaurusguilelmiimSimolestesvoraxSimosaurusgaillardotiSpitrasaurus_larseniSpitrasaurus_wensaasiStyxosaurussnowiiTerminonatatorpontiexenThalassiodraconhawkinsiThalassomedonhaningtoniThililualongicollisTricleidusseeleyiTrinacromerumbentonianuUmoonasaurusdemoscyllusOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Druckenmiller_et_Knutsen_2012a